<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>VUE</title>
</head>
<body>
<div id="app">
    <p v-if="see">现在你看到我了</p>
</div>
<!-- 开发环境版本，包含了有帮助的命令行警告 -->
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script>
    var xxx = new Vue({
        el: '#app',
        data: {
            message: 'Hello Vue!',
            see:true
        }
    })
</script>


</body>
</html>